If these abilities would scale to the crew, then the crew damage system would need a tweak. Currently, ships with larger crews actually worse of because torp shots, etc kill a PERCENTAGE of crew, so a 10% crew death to a Galaxy would mean 100 dead crew, while a Defiant would have 5 dead. The way it should be is that crew deaths are fixed. If galaxy would have 10 dead after a torp shot, then a Defiant should too.

Star Trek: Lockbox
Kirk: Scotty, Stuff that 2 million ton D'kora into the Lockbox or else STO fails.
Scotty: I canna change the laws of physics!!!!!!
Kirk: Of course you can you're a miracle worker.